Answer: In one study, exercise stimulated the human brain's ability to maintain old network connections and make new ones that are vital to cognitive health. Other studies have shown that exercise increased the size of a brain structure important to memory and learning, improving spatial memory.
Diffusion.
diffusion acts passively, and the oxygen and carbon dioxide move to the area of lower concentration
<span>any waking behavior characterized by an energy expenditure ≤1.5 metabolic equivalents (METs), while in a sitting, reclining or lying posture.</span>
